I haven't installed Home Assistant but I have openhab and the gateway running on the same raspberry pi.
HA should't be any different.
Posts made by David Cabañero
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RE: Raspberry Pi gateway and controller in oneposted in Home Assistant
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RE: Sensor + Interrupt questionsposted in Hardware
Hi @CrankyCoder ,
I think that 18650 will have plenty of juice for a project like this one.
Do you have an idea on how much does the water sensor consume in sleep mode? I am curious and I might actually go for the same project.
Which one are you using?
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RE: Sensor + Interrupt questionsposted in Hardware
Hi CrankyCoder,
I have door/window sensors running using interruptions. I got rid of the regulator and the power led and I am using a step up converter to take as much juice as possible from the batteries. The oldest node has been running for a year already on 2 AA batteries so your project is definitely doable.
The problem could be in case the leak sensor throws a lot of false positives in which case it would drain the battery quicker.
I hope it helps.
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David
[http://www.smarthomeblog.net]